| 234 | } |
| 235 | |
| 236 | fn kg_fts_search(&self, query: &str, limit: usize) -> PristineResult<Vec<KgNode>> { |
| 237 | let fts_table = match self.txn.open_multimap_table(KG_FTS) { |
| 238 | Ok(t) => t, |
| 239 | Err(redb::TableError::TableDoesNotExist(_)) => return Ok(Vec::new()), |
| 240 | Err(e) => return Err(PristineError::from(e)), |
| 241 | }; |
| 242 | |
| 243 | let tokens = tokenize_for_fts(query); |
| 244 | if tokens.is_empty() { |
| 245 | return Ok(Vec::new()); |
| 246 | } |
| 247 | |
| 248 | // Collect node IDs that match any token, count matches per node |
| 249 | let mut hit_counts: std::collections::HashMap<String, usize> = |
| 250 | std::collections::HashMap::new(); |
| 251 | for token in &tokens { |
| 252 | let iter = match fts_table.get(token.as_str()) { |
| 253 | Ok(iter) => iter, |
| 254 | Err(_) => continue, |
| 255 | }; |
| 256 | for result in iter { |
| 257 | let node_id_guard: redb::AccessGuard<'_, &str> = result?; |
| 258 | let node_id = node_id_guard.value().to_string(); |
| 259 | *hit_counts.entry(node_id).or_insert(0) += 1; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | // Sort by relevance: boost entity nodes (3x) and file nodes (2x) |
| 264 | // over change nodes (1x). Entities and files are more useful for |
| 265 | // code exploration than individual change records. |
| 266 | let mut ranked: Vec<(String, usize)> = hit_counts.into_iter().collect(); |
| 267 | ranked.sort_by(|a, b| { |
| 268 | let boost_a = if a.0.starts_with("entity:") { |
| 269 | a.1 * 3 |
| 270 | } else if a.0.starts_with("file:") { |
| 271 | a.1 * 2 |
| 272 | } else { |
| 273 | a.1 |
| 274 | }; |
| 275 | let boost_b = if b.0.starts_with("entity:") { |
| 276 | b.1 * 3 |
| 277 | } else if b.0.starts_with("file:") { |
| 278 | b.1 * 2 |
| 279 | } else { |
| 280 | b.1 |
| 281 | }; |
| 282 | boost_b.cmp(&boost_a) |
| 283 | }); |
| 284 | ranked.truncate(limit); |
| 285 | |
| 286 | // Fetch full nodes |
| 287 | let mut nodes = Vec::new(); |
| 288 | for (id, _) in &ranked { |
| 289 | if let Some(node) = self.get_kg_node(id)? { |
| 290 | nodes.push(node); |
| 291 | } |
| 292 | } |
| 293 | Ok(nodes) |